of an eighteen-minute window at 03:13, resulted in a scrub after a hold was called less than ten seconds before the rocket was scheduled to launch, due to a problem with the thrust vectoring of the solid rocket motors. Launch attempts on 26 and 27 May 2010 (UTC) were not possible as the Eastern Range had to be reconfigured to support the final landing of , returning from STS-132. Unlike earlier GPS satellites, which were launched on Atlas E/F and Delta II rockets, GPS IIF SV-1 was placed directly into its operational orbit, eliminating the need for an apogee motor. Operational status After the launch the satellite underwent a testing period which was scheduled to last between 90 and 120 days. It was declared operational 27 August 2010 at 04:10 UTC. See also Compass-G1 GPS IIR-1 USA-206 References Spacecraft launched in 2010 GPS satellites Spacecraft launched by Delta IV rockets USA satellites